I've set up a self signed certificate in FileZilla server and enabled FTP over SSL/TPS. When I connect from the client FileZilla, I am able to authenticate but cannot get a directory listing:

Status: Connecting to MY_SERVER_IP:21...
Status: Connection established, waiting for welcome message...
Response:   220-FileZilla Server version 0.9.39 beta
Response:   220-written by Tim Kosse ([email protected])
Response:   220 Please visit http://sourceforge.net/projects/filezilla/
Command:    AUTH TLS
Response:   234 Using authentication type TLS
Status: Initializing TLS...
Status: Verifying certificate...
Command:    USER MYUSER
Status: TLS/SSL connection established.
Response:   331 Password required for MYUSER
Command:    PASS ********
Response:   230 Logged on
Command:    PBSZ 0
Response:   200 PBSZ=0
Command:    PROT P
Response:   200 Protection level set to P
Status: Connected
Status: Retrieving directory listing...
Command:    PWD
Response:   257 "/" is current directory.
Command:    TYPE I
Response:   200 Type set to I
Command:    PORT 10,10,25,85,219,172
Response:   200 Port command successful
Command:    MLSD
Response:   150 Opening data channel for directory list.
Response:   425 Can't open data connection.
Error:  Failed to retrieve directory listing

I have ports 21 and 50001 through 50005 open on the firewall. We are migrating servers - the 50001 - 50005 is one of the things that helped get FTPS working on the old server. I'm not sure this installation would use the same ports? What else could be the problem?